Azure blob 存储破坏了图像质量

Question

我正在使用 Azure Blob 存储添加图像。我的图像质量由于某种原因以不良方式改变，导致我的功能不正确。

谁能给它点灯。我该如何避免？

CloudBlockBlob blob = _blobContainer.GetBlockBlobReference(filename);
file.Position = 0;
stickerBlob.Properties.ContentType = "image/bmp";
stickerBlob.UploadFromStream(file);    //its just a Stream Object.

代码共享。我还提到了内容类型。我也可以下载并查看图像，但没有任何 ContentType ，而且我的逻辑对该图像也失败了。

Answer 1

将图片保存为 .png 格式会更好。您可能想要指定其他格式的压缩级别 (https://msdn.microsoft.com/en-us/library/bb882583(v=vs.110).aspx)

public bool UploadImage(Bitmap bitmap)
{
    bool success = false;
    try
    {
        CloudBlobContainer container = BlobClient.GetContainerReference("YourContainerName");
        CloudBlockBlob blob = container.GetBlockBlobReference("YourBlobReference");
        blob.Properties.ContentType = "image/png";
        byte[] file;
        using (MemoryStream stream = new MemoryStream())
        {
            bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
            file = stream.ToArray();
        }
        blob.UploadFromStream(new MemoryStream(file));
        success = true;

    }
    catch (Exception ex)
    {
        //Handle error here
    }
    return success;
}

Azure blob 存储破坏了图像质量

Azure blob Storage is messing Image Quality

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